Stove.



PATBNTBD BBQ. 13, 1904.

T. A. DOUGHTY.

STOVE.

APPLIOATION FILED FEB. 26, 1904.

N0 MODEL.

UNTTED STATES -Pate11ted December 13, 1904.

PATENT OFFICE.

STOVE.

SPECIFICATION forming part of Letters Patent No. 777,187, dated December 13, 1904.

Application filed February 26, 1904;, Serial Nol95,371. No model.)

To all whom, it nuty concern:

Be it known that I, Tmcononn A. Donerrrr, a citizen of the United States of America, residing at Woodstock, in the county of McHenry and State of Illinois, have invented certain new and useful Improvements in Stoves, of which the following is a specification.

My invention relates to certain new and useful improvements in stoves; and its object is to produce a device of this class which shall have certain advantages, which will appear more fully and at large in the'course of this specification.

To this end my invention consists in certain novel features of construction, which are clearly illustrated in the accompanying drawings and described in this specification.

In the aforesaid drawings, Figure 1 is a central vertical section through my improved stove. Fig. 2 is a horizontal section in the line 2 2 of Fig. 1. Fig. 3 is a horizontal section in the line 3 3 of Fig. 1. Fig. A is a horizontal section in the line A 4 of Fig. 1, and Fig. 5 is an under plan of a portion of the bottom of the stove.

Referring to the drawings, A. is the casing of my improved stove, the said casing having in the preferred form of construction a lire pot a, which is separated by a slight distance from the wall of the casing.

The stove is provided with a magazine a for the entrance of coal at the top, a door a above the lire-pot (t, and a door a in the ash-pit below the fire-pot. Below the lire-pot (a is an annular chamber B, which lies against the wall of the casing and is provided with perforations b at its bottom. The form of this annular chamber will be clearly understood by reference to the drawings. It will be seen that it is in the preferred form semicircular in vertical section, so that the upper and central part shields the perforations at the bottom from the ashes which might otherwise fall into them. This annular chamber B has a gap at its forward end to leave room for the door a and is therefore not perfectly continuous around the lower end of the stove. At the rear of the easing A is a flue O, the lower end of which communicates. with the rear of the annular chamber B and which is provided near the top of the casing with a cross-flue C, entering the upper part of the casing A.

The bottom of the casing A. is provided with two perforations, through which pass pipes D, said pipes extending upward into the an nular chamber B on opposite sides of the center and extending through the same, as illustrated in Fig. 3, these pipes being continued back into the flue O, turned upward therein, and carried back through the cross-flue O into the upper part of the stove, the said pipes being provided with curved ends I), which surround the magazine e and are perforated, as shown. By means of this construction air can enter the lower ends of the pipe D from below the stove, pass along the pipes D, through the annular chamber B, up the flue O, back into the body of the stove, and thence down to the firepot, as illustrated by the arrows in the drawings. The lire-pot is preferably constructed with vertical slots in its wall, and an annular space is provided between the fire-pot and the casing of the stove, so that the downdraft may pass around the fire besides passing through it. After passing by the fire-pot the air can enter the perforations b in the chamber B, pass again thercthrough around the pipes D, and pass up into the flue G into the chimney. In this way an cflicient dowmlraft-stove is provided, which has the particular advantage that the fresh air before it enters the interior of the stove passes in tubes through the exhaust-flue and is heated by contact with the products of combustion.

In, order to control the drafts of my improved stovc, three dampers are provided. One damper, E, Fig. 5, controls the amount of air passingthrough the pipes D. This damper, it will be seen, consists in the preferred form of two circular plates (1, pivoted to the bottom of the stove, the said plates being connected by a cross-bar c. A push-lever E is provided on the bottom of the stove, the rear end of this push-lever being bent downward at to form a earn-surface engaging with the crossbar c, so that as the push-lever E is pushed in the cross-bar will be moved up, thus swinging the plates c against the bottom of the stove and closing the ends of the pipes D. The second damper is indicated by F,

and this damper when closed greatly contracts the capacity of the flue O. The third damper is indicated at G, and this damper closes the cross-flue O.

Occasionally, as in starting a fire, it is desirable to have a stronger draft than can be obtained with the arrangement of air-passages thus far described, and in such case the damper F is closed, the damper Or is opened to establish direct communication of the interior of the stove with the chimney, and the lower door a or a draft therein is opened. In

this case the air passes in through the lower door or draft, through the fire-pot, and directly up through the body of the stove and through the cross-flue G into the chimney. In this way a stove of ordinary operation is obtained which can be shifted to a downdraftstove with little or no difiiculty.

I realize that considerable variation is possible in the details of this construction without departing from the spirit of the invention,

and I therefore do not intend to limit myself to the specific form herein shown and described.

in the county of lWIcHenry and State of Illinois, this 22d day of February, A. D. 1904.

THEODORE A. DOUGHTY. Witnesses:

F. H. OPFERGELT, JOHN M. HoY. 

